Method for balancing a component

Abstract

The invention relates to a method for balancing a component ( 1 ), in particular a rotor of an electric machine, using pins ( 11, 11′ ) which are introduced into prefabricated openings ( 5, 7, 9 ) in the component ( 1 ). The component ( 1 ) is balanced in that pins ( 11, 11′ ) of different lengths, cross-sectional areas, and cross-sectional shapes are fixed in corresponding openings ( 7, 9 ) in the component ( 1 ). Furthermore, the pins ( 11, 11′ ) can be assembled from multiple elements ( 13, 13′ ), and the method can be used to increase the balancing quality incrementally in one or more stages. The imbalance of the component ( 1 ) can be considerably reduced using said method, and simultaneously the weight, space requirements, and inertia of the component ( 1 ) can be reduced. In addition, the method can be automated.

The invention claimed is: 
     
       1. A method for balancing a component, comprising fixing pins having cross-sectional areas of different sizes in prefabricated corresponding openings of the component, wherein one of the openings is circular and has a first cross-sectional area, further comprising arranging the openings such that three further ones of the openings being circular in configuration and having a second cross-sectional area are arranged with their edges in immediate vicinity of an edge of the opening of first cross-sectional area, with the second cross-sectional area of the three further ones of the openings being smaller than the first cross-sectional area. 
     
     
       2. The method of  claim 1 , wherein the component is a rotor of an electric machine. 
     
     
       3. The method of  claim 1 , wherein one of the openings is circular and has a first cross-sectional area, further comprising arranging the openings such that a further one of the openings having a second cross-sectional area is arranged in the vicinity of the circular opening, with the second cross-sectional area being smaller than the first cross-sectional area. 
     
     
       4. The method of  claim 1 , wherein the pins of different sizes have different cross-sectional shapes and different cross-sectional areas and/or are produced from materials having different densities. 
     
     
       5. The method of  claim 1 , wherein the pins are made from aluminum, steel, zinc, tungsten, lead, resin or plastic. 
     
     
       6. The method of  claim 1 , further comprising assembling each of the pins from multiple elements for subsequent fixing in a corresponding one of the openings. 
     
     
       7. The method of  claim 1 , wherein the pins, after determination of an imbalance, are introduced automatically into the openings, and further comprising repeating a balancing operation, when a quality of balancing is inadequate. 
     
     
       8. The method of  claim 1 , wherein the pins have a shape which is cylindrical or angular and/or have cross-sectional areas formed from a combination of cross-sectional areas having different shapes. 
     
     
       9. A component of an electric machine comprising pins having cross-sectional areas of different sizes, said component having openings defined by cross-sectional areas of different sizes to complement the cross-sectional areas of the pins, said pins being fixed in the openings for balancing the component, wherein one of the openings is circular and has a first cross-sectional area, and three further ones of the openings are circular in configuration and have a second cross-sectional area, said further openings being arranged with their edges in immediate vicinity of an edge of the opening of first cross-sectional area, with the second cross-sectional area of the three further ones of the openings being smaller than the first cross-sectional area. 
     
     
       10. The component of  claim 9 , wherein one of the openings is circular and has a first cross-sectional area, and a further one of the openings has a second cross-sectional area which is arranged in the vicinity of the circular opening, with the second cross-sectional area being smaller than the first cross-sectional area. 
     
     
       11. The component of  claim 9 , wherein the pins of different sizes have different cross-sectional shapes and different cross-sectional areas and/or are produced from materials having different densities. 
     
     
       12. The component of  claim 9 , wherein the pins are made from aluminum, steel, zinc, tungsten, lead, resin or plastic. 
     
     
       13. The component of  claim 9 , wherein each of the pins is assembled from multiple elements for subsequent fixing in a corresponding one of the openings. 
     
     
       14. The component of  claim 9 , wherein the pins, after determination of an imbalance, are introduced automatically into the openings. 
     
     
       15. The component of  claim 9 , wherein the pins have a shape which is cylindrical or angular and/or have cross-sectional areas formed from a combination of cross-sectional areas having different shapes. 
     
     
       16. An electrically rotating machine, comprising a component which includes pins having cross-sectional areas of different sizes, said component having openings defined by cross-sectional areas of different sizes to complement the cross-sectional areas of the pins, said pins being fixed in the openings for balancing the component, wherein one of the openings is circular and has a first cross-sectional area, and three further ones of the openings are circular in configuration and have a second cross-sectional area, said further openings being arranged with their edges in immediate vicinity of an edge of the opening of first cross-sectional area, with the second cross-sectional area of the three further ones of the openings being smaller than the first cross-sectional area.